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A08: Low Temp Alarm

Modified on: Wed, 28 Feb, 2018 at 5:20 PM

Low Temp Alarm is triggered when the indoor temperature drops below temperature setpoint - low temp alarm trigger (default = 34°F). This alarm has built-in 1 minute delay. AIRSYS WPUs are designed for equipment sites where they are usually unoccupied. As such, the heater turns on 29 degrees below the main setpoint by default. Comfort mode is recommended if equipment site is temporarily occupied.

Troubleshooting

Possible Cause

Component to Check

Recommended Action

Improper value set for low temp alarm trigger

Lt under E menu or other thermostat used to monitor site temperature.

Default = 34°F below the main setpoint.

Improper value set for heater turn on

Lead compressor turn on: H02 under E menu.Lag compressor turn on: F38 under L05 MenuIf using the pGD, these parameters can be accessed from the User Menu.

Correct heater settings.

Heating command not given by controller

Other alarms in the systemUse D53/D58 under C Menu to view current heater command for unit1/unit2 respectively.If using the pGD, use Input/Output Menu to view current commands.

Correct other alarms that would prevent heater start up, such as fan overload.